#include <boost/asio.hpp>
#include <boost/bind/bind.hpp>
#include <boost/thread.hpp>
#include <iostream>

class printer {
public:
  printer(boost::asio::io_context &io)
      : strand_(boost::asio::make_strand(io)),
        timer1_(io, boost::asio::chrono::seconds(1)),
        timer2_(io, boost::asio::chrono::seconds(2)), count_(0) {
    timer1_.async_wait(boost::asio::bind_executor(
        strand_, boost::bind(&printer::print1, this)));

    timer2_.async_wait(boost::asio::bind_executor(
        strand_, boost::bind(&printer::print2, this)));
  }

  ~printer() { std::cout << "Final count is " << count_ << std::endl; }

private:
  void print1() {
    if (count_ < 10) {
      std::cout << "Timer 1: " << count_ << std::endl;
      ++count_;
      timer1_.expires_at(timer1_.expiry() + boost::asio::chrono::seconds(1));
      timer1_.async_wait(boost::asio::bind_executor(
          strand_, boost::bind(&printer::print1, this)));
    }
  }

  void print2() {
    if (count_ < 10) {
      std::cout << "Timer 2: " << count_ << std::endl;
      ++count_;
      timer2_.expires_at(timer2_.expiry() + boost::asio::chrono::seconds(1));
      timer2_.async_wait(boost::asio::bind_executor(
          strand_, boost::bind(&printer::print2, this)));
    }
  }

private:
  boost::asio::strand<boost::asio::io_context::executor_type> strand_;
  boost::asio::steady_timer timer1_;
  boost::asio::steady_timer timer2_;
  int count_;
};

int main() {
  boost::asio::io_context io;
  printer p(io);
  boost::thread t(boost::bind(&boost::asio::io_context::run, &io));
  io.run();
  t.join();

  return 0;
}